/* Copyright 2013 University of Padua, Italy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package it.dei.unipd.healthservice.database;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import it.dei.unipd.healthservice.resource.*;

/**
 * Visualizza i fornitori
 * 
 * @author Giorgio Vitale
 * @version 1.00
 */
public class ViewFornitoriDatabase {
	/**
	 * Interrogazione al database
	 */
	private static final String STATEMENT = "SELECT * FROM fornitore ORDER BY ragionesociale;";
	/**
	 * Interrogazione al database per un singolo fornitore
	 */
	private static final String FORNITORE_SINGOLO = "SELECT * FROM fornitore WHERE piva=?  ORDER BY ragionesociale;";
	
	/**
	 * Connessione al database
	 */
	private final Connection con;
	/**
	 * Risultati della ricerca
	 */
	private final List<Fornitore> fornitori;
	/**
	 * P.IVA da ricercare
	 */
	private final String piva;
	
	/**
	 * Ricerca tutti i fornitori
	 * 
	 * @param con connessione al database.
	 */
	public ViewFornitoriDatabase(Connection con) {
		this(con, null);
	}
	/**
	 * Ricerca un fornitore
	 * 
	 * @param con connessione al database.
	 * @param piva partita iva da ricercare
	 */
	public ViewFornitoriDatabase(Connection con, String piva) {
		this.con = con;
		fornitori = new ArrayList<Fornitore>();
		this.piva = piva;
	}
	
	
	/**
	 * Cerca i fornitori
	 * 
	 * @return una lista di fornitori.
	 * @throws SQLException
	 *             in caso di problemi nell'accesso al database.
	 */
	public List<Fornitore> search() throws SQLException {
		PreparedStatement pstmt = null;
		ResultSet rs = null;

		try {
			if (piva==null)
				pstmt = con.prepareStatement(STATEMENT);
			else{
				pstmt = con.prepareStatement(FORNITORE_SINGOLO);
				pstmt.setString(1, piva);
			}
			rs = pstmt.executeQuery();
			while (rs.next())
				try{
					fornitori.add(new Fornitore(rs.getString("piva"), rs.getString("ragionesociale"),
							rs.getString("mail"),rs.getString("tel"),rs.getString("stato"),rs.getString("provincia"),
							rs.getString("citta"), rs.getString("indirizzo"), rs.getString("cap")));
				}catch (IllegalArgumentException e){}
		}
		finally {
			if (rs != null)
				rs.close();
			if (pstmt != null)
				pstmt.close();
			con.close();
		}
		return fornitori;
	}
}